package com.cloud.gateway.filters;

import org.springframework.cloud.gateway.filter.GatewayFilter;
import org.springframework.cloud.gateway.filter.factory.AbstractGatewayFilterFactory;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.stereotype.Component;

import java.util.Arrays;
import java.util.List;

/**
 * @author wuyue
 * @date 2020/1/13 15:48
 */
@Component
//自定义过滤器的命名应该为：***GatewayFilterFactory
public class MyParamGatewayFilterFactory extends AbstractGatewayFilterFactory<MyParamGatewayFilterFactory.Config> {
    public static final String PARAM_NAME = "ts";
    public MyParamGatewayFilterFactory() {
        super(Config.class);
    }
    @Override
    public List<String> shortcutFieldOrder() {
        return Arrays.asList(PARAM_NAME);
    }
    @Override
    public GatewayFilter apply(Config config) {
        return (exchange, chain) -> {
            ServerHttpRequest request = exchange.getRequest();
            if (request.getQueryParams().containsKey(config.param)) {
                request.getQueryParams().get(config.param)
                        .forEach(value -> System.out.printf("----------局部过滤器-----%s = %s-----", config.param,value));
            }
            return chain.filter(exchange);
        };
    }
    public static class Config {
        private String param;
        public String getParam() {
            return param;
        }
        public void setParam(String param) {
            this.param = param;
        }
    }

}
